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DEBT - Amendment No. 15 Loan Modification Agreement and Refinancing Facility Agreement (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 04, 2024 | Mar. 22, 2024 | Jun. 29, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022 | Mar. 21, 2024
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 24,319 |  |  |
Debt Instrument, Unamortized Discount (Premium), Net |  |  |  | 51 | $ 56 |  |
REFINANCING COSTS |  |  |  | 58 | $ 56 | $ 1 |
Tranche I Term Loans |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, face amount | $ 2,644 | $ 4,525 |  |  |  |  |
Interest rate |  | 2.75% |  |  |  |  | 3.25%
Debt Instrument, Periodic Payment, Principal | $ 5 | $ 11 |  |  |  |  |
Long-Term Debt, Refinanced, Amount |  |  | $ 2,644 |  |  |  |
Tranche H Term Loans |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  | 1,708 |  |  |  |  |
Tranche K Term Loans |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 1,708 |  |  |  |  |
Interest rate |  | 2.75% |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  | 0.25% |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium), Net |  | $ 4 |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  | $ 4 |  |  |  |  |
Tranche I And K Term Loans |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium), Net |  |  |  | 2 |  |  |
REFINANCING COSTS |  |  |  | $ 5 |  |  |

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- Definition The aggregate expense charged against earnings for refinancing the entity's debt structure, comprising the premium paid to redeem senior subordinated notes, the write off of debt issue costs and unamortized note premium and discount, and costs for settlement of interest rate swap agreement and other expenses. + References No definition available. + Details
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